412_64 move to handwired (#5359)

* 412_64 move to handwired

412_64 and its second printing, Mark Zero Stand Aside, are now obsolesced by new hardware. As only two units exist in the wild not owned by me, I'm moving the definition to handwired.

* Mark 3 Stand Aside ready for production.

Uploading firmware, compiled and tested, for Mark 3 Stand Aside. The hardware's ready, now the software is too.

* Whoops.

Should've branched before pushing Stand Aside. Sorry 'bout that.

* Revert "Whoops."

This reverts commit d222046cfe.

* Revert "Mark 3 Stand Aside ready for production."

This reverts commit c790899af7.

keyboards/handwired/412_64/readme.md

@@ -1,15 +1,15 @@
 # 412-64
 
-![412-64](image_here)
+![412-64](https://i.imgur.com/ixuv3OM.jpg)
 
 A compact 60% keyboard designed by Fate Everywhere and sold on a limited basis. Born out of the desire for a Planck with a numpad for technical work.
 
 Keyboard Maintainer: [Fate Everywhere](https://github.com/fateeverywhere)  
-Hardware Supported: 4x16 T&E Prototype, 412-64 Mk. 0, Mk. 1.  
-Hardware Availability: Highly limited, contact /u/FateEverywhere on reddit for availability.
+Hardware Supported: 4x16 T&E Prototype, Mark Zero Stand Aside.  
+Hardware Availability: No longer available, was a tester for Stand Aside. Build definitions are in handwired because two units are in the wild.
 
 Make example for this keyboard (after setting up your build environment):
 
-    make 412-64:default
+    make handwired/412_64:default
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).